Steerable laser probe

ABSTRACT

A steerable laser probe may include an actuation structure, a nosecone fixed to the actuation structure by one or more links and one or more link pins, a flexible housing tube, and an optic fiber disposed in the flexible housing tube and the actuation structure. A compression of the actuation structure may be configured to gradually curve the flexible housing tube and the optic fiber. A decompression of the actuation structure may be configured to gradually straighten the flexible housing tube and the optic fiber.

CROSS-REFERENCE TO RELATED APPLICATIONS

This Application is a continuation of prior application Ser. No.13/963,038 filed Aug. 9, 2013.

FIELD OF THE INVENTION

The present disclosure relates to a surgical instrument, and, moreparticularly, to a steerable laser probe.

BACKGROUND OF THE INVENTION

A wide variety of ophthalmic procedures require a laser energy source.For example, ophthalmic surgeons may use laser photocoagulation to treatproliferative retinopathy. Proliferative retinopathy is a conditioncharacterized by the development of abnormal blood vessels in the retinathat grow into the vitreous humor. Ophthalmic surgeons may treat thiscondition by energizing a laser to cauterize portions of the retina toprevent the abnormal blood vessels from growing and hemorrhaging.

In order to increase the chances of a successful laser photocoagulationprocedure, it is important that a surgeon is able aim the laser at aplurality of targets within the eye, e.g., by guiding or moving thelaser from a first target to a second target within the eye. It is alsoimportant that the surgeon is able to easily control a movement of thelaser. For example, the surgeon must be able to easily direct a laserbeam by steering the beam to a first position aimed at a first target,guide the laser beam from the first position to a second position aimedat a second target, and hold the laser beam in the second position.Accordingly, there is a need for a surgical laser probe that can beeasily guided to a plurality of targets within the eye.

BRIEF SUMMARY OF THE INVENTION

The present disclosure presents a steerable laser probe. Illustratively,a steerable laser probe may comprise an actuation structure, a noseconefixed to the actuation structure by one or more links and one or morelink pins, a flexible housing tube, and an optic fiber disposed in theflexible housing tube and the actuation structure. In one or moreembodiments, a compression of the actuation structure may be configuredto gradually curve the flexible housing tube. Illustratively, a gradualcurving of the flexible housing tube may be configured to graduallycurve the optic fiber. In one or more embodiments, a decompression ofthe actuation structure may be configured to gradually straighten theflexible housing tube. Illustratively, a gradual straightening of theflexible housing tube may be configured to gradually curve the opticfiber.

BRIEF DESCRIPTION OF THE DRAWINGS

The above and further advantages of the present invention may be betterunderstood by referring to the following description in conjunction withthe accompanying drawings in which like reference numerals indicateidentical or functionally similar elements:

FIG. 1 is a schematic diagram illustrating an exploded view of a handleassembly;

FIGS. 2A and 2B are schematic diagrams illustrating a handle;

FIG. 3 is a schematic diagram illustrating a flexible housing tube;

FIG. 4 is a schematic diagram illustrating an exploded view of asteerable laser probe assembly;

FIGS. 5A, 5B, 5C, 5D, and 5E are schematic diagrams illustrating agradual curving of an optic fiber;

FIGS. 6A, 6B, 6C, 6D, and 6E are schematic diagrams illustrating agradual straightening of an optic fiber;

FIGS. 7A and 7B are schematic diagrams illustrating a handle;

FIG. 8 is a schematic diagram illustrating a flexible housing tube;

FIG. 9 is a schematic diagram illustrating an exploded view of asteerable laser probe assembly;

FIGS. 10A, 10B, 10C, 10D, and 10E are schematic diagrams illustrating agradual curving of an optic fiber;

FIGS. 11A, 11B, 11C, 11D, and 11E are schematic diagrams illustrating agradual straightening of an optic fiber.

DETAILED DESCRIPTION OF AN ILLUSTRATIVE EMBODIMENT

FIG. 1 is a schematic diagram illustrating an exploded view of a handleassembly 100. Illustratively, a handle assembly 100 may comprise anosecone 105 having a nosecone distal end 106 and a nosecone proximalend 107, an actuation structure 110 having an actuation structure distalend 111 and an actuation structure proximal end 112, a front plug 115, adistal ring 116, a proximal ring 117, an outer sleeve 120 having anouter sleeve distal end 121 and an outer sleeve proximal end 122, anactuation guide 130 having an actuation guide distal end 131 and anactuation guide proximal end 132, an inner hypodermic tube 140 having aninner hypodermic tube distal end 141 and an inner hypodermic tubeproximal end 142, a piston 150 having a piston distal end 151 and apiston proximal end 152, an end plug 160 having an end plug distal end161 and an end plug proximal end 162, one or more links 170, one or morespacers 175, and one or more link pins 180. In one or more embodiments,nosecone 105, actuation structure 110, front plug 115, outer sleeve 120,actuation guide 130, inner hypodermic tube 140, piston 150, and end plug160 may be manufactured from any suitable material, e.g., polymers,metals, metal alloys, etc., or from any combination of suitablematerials.

FIGS. 2A and 2B are schematic diagrams illustrating a handle 200. FIG.2A illustrates a side view of a handle 200. Illustratively, handle 200may comprise a handle distal end 201 and a handle proximal end 202. Inone or more embodiments, a portion of nosecone 105 may be fixed to aportion of actuation structure 110, e.g., nosecone proximal end 107 maybe fixed to actuation structure distal end 111. Illustratively, nosecone105 may be fixed to actuation structure 110, e.g., by one or more links170. In one or more embodiments, one or more link pins 180 may beconfigured to fix nosecone 105 to one or more links 170, e.g., aparticular link pin 180 may be disposed within nosecone 105 and aparticular link 170. Illustratively, one or more link pins 180 may beconfigured to fix actuation structure 110 to one or more links 170,e.g., a particular link pin 180 may be disposed within actuationstructure 110 and a particular link 170. In one or more embodiments, afirst link pin 180 may be configured to fix nosecone 105 to a particularlink 170 and a second link pin 180 may be configured to fix actuationstructure 110 to the particular link 175. Illustratively, one or morespacers 175 may be configured to prevent undesirable movement of one ormore links 170 relative to one or more link pins 180, e.g., a particularspacer 175 may be disposed over a portion of a particular link pin 180extending from a particular link 170.

In one or more embodiments, a portion of inner hypodermic tube 140 maybe disposed within piston 150, e.g., inner hypodermic tube proximal end142 may be disposed within piston 150. Illustratively, a portion ofinner hypodermic tube 140 may be fixed within piston 150, e.g., by anadhesive or any suitable fixation means. In one or more embodiments,inner hypodermic tube proximal end 142 may be fixed within piston 150,e.g., by an adhesive or any suitable fixation means. Illustratively,actuation guide 130 may be disposed within outer sleeve 120. In one ormore embodiments, actuation guide 130 may be fixed within outer sleeve120, e.g., by an adhesive or any suitable fixation means.Illustratively, piston 150 may be disposed within actuation guide 130.In one or more embodiments, piston 150 may be configured to actuatewithin actuation guide 130.

In one or more embodiments, distal ring 116 may be disposed over aportion of front plug 115. Illustratively, front plug 115 may beconfigured to interface with a portion of outer sleeve 120, e.g., frontplug 115 may be configured to interface with outer sleeve distal end121. In one or more embodiments, front plug 115 may be configured tointerface with a portion of actuation guide 130, e.g., front plug 115may be configured to interface with actuation guide distal end 131.Illustratively, front plug 115 may be disposed within outer sleeve 120.In one or more embodiments, a portion of front plug 115 may be disposedwithin actuation guide 130. Illustratively, distal ring 116 may bedisposed within actuation guide 130, e.g., distal ring 116 may beconfigured to form a hermetic seal within actuation guide 130.

In one or more embodiments, proximal ring 117 may be disposed over aportion of end plug 160. Illustratively, end plug 160 may be configuredto interface with a portion of outer sleeve 120, e.g., end plug 160 maybe configured to interface with outer sleeve proximal end 122. In one ormore embodiments, end plug 160 may be configured to interface with aportion of actuation guide 130, e.g., end plug 160 may be configured tointerface with actuation guide proximal end 132. For example, a portionof end plug 160 may be disposed within actuation guide 130.Illustratively, proximal ring 117 may be disposed within actuation guide130, e.g., proximal ring 117 may be configured to form a hermetic sealwithin actuation guide 130. In one or more embodiments, end plug 160 maybe disposed within outer sleeve 120. Illustratively, inner hypodermictube 140 may be disposed within piston 150, actuation guide 130, frontplug 115, distal ring 116, and nosecone 105. In one or more embodiments,a portion of inner hypodermic tube 140 may be fixed within nosecone 105,e.g., inner hypodermic tube distal end 141 may be fixed within nosecone105. Illustratively, a portion of inner hypodermic tube 140 may be fixedwithin nosecone 105, e.g., by an adhesive or any suitable fixationmeans.

In one or more embodiments, a compression of actuation structure 110 maybe configured to rotate one or more links 170 about one or more linkpins 180. Illustratively, a rotation of one or more links 170 about oneor more link pins 180 may be configured to extend a particular link pin180, e.g., a particular link pin 180 disposed in nosecone 105, relativeto handle proximal end 202. In one or more embodiments, an extension ofa particular link pin 180 disposed in nosecone 105 relative to handleproximal end 202 may be configured to extend nosecone 105 relative tohandle proximal end 202. Illustratively, a compression of actuationstructure 110 may be configured to extend nosecone 105 relative tohandle proximal end 202. In one or more embodiments, an extension ofnosecone 105 relative to handle proximal end 202 may be configured toextend inner hypodermic tube 140 relative to handle proximal end 202.Illustratively, an extension of inner hypodermic tube 140 relative tohandle proximal end 202 may be configured to actuate piston 150 withinactuation guide 130. In one or more embodiments, a compression ofactuation structure 110 may be configured to extend piston 150 relativeto handle proximal end 202.

In one or more embodiments, a decompression of action structure 110 maybe configured to rotate one or more links 170 about one or more linkpins 180. Illustratively, a rotation of one or more links 170 about oneor more link pins 180 may be configured to retract a particular link pin180, e.g., a particular link pin 180 disposed in nosecone 105, relativeto handle proximal end 202. In one or more embodiments, a retraction ofa particular link pin 180 disposed in nosecone 105 relative to handleproximal end 202 may be configured to retract nosecone 105 relative tohandle proximal end 202. Illustratively, a decompression of actuationstructure 110 may be configured to retract nosecone 105 relative tohandle proximal end 202. In one or more embodiments, a retraction ofnosecone 105 relative to handle proximal end 202 may be configured toretract inner hypodermic tube 140 relative to handle proximal end 202.Illustratively, a retraction of inner hypodermic tube 140 relative tohandle proximal end 202 may be configured to actuate piston 150 withinactuation guide 130. In one or more embodiments, a decompression ofactuation structure 110 may be configured to retract piston 150 relativeto handle proximal end 202.

FIG. 2B illustrates a cross-sectional view of a handle 200. In one ormore embodiments, handle 200 may comprise an optic fiber housing 210, aninner bore 220, an optic fiber guide 230, and a flexible housing tubehousing 240. Illustratively, handle 200 may be manufactured from anysuitable material, e.g., polymers, metals, metal alloys, etc., or fromany combination of suitable materials.

FIG. 3 is a schematic diagram illustrating a flexible housing tube 300.Illustratively, flexible housing tube 300 may comprise a flexiblehousing tube distal end 301 and a flexible housing tube proximal end302. Flexible housing tube 300 may be manufactured from any suitablematerial, e.g., polymers, metals, metal alloys, etc., or from anycombination of suitable materials. Illustratively, flexible housing tube300 may comprise a shape memory material, e.g., Nitinol. In one or moreembodiments, flexible housing tube 300 may be manufactured from amaterial having an ultimate tensile strength between 700 and 1000 MPa.Illustratively, flexible housing tube 300 may be manufactured from amaterial having ultimate tensile strength less than 700 MPa or greaterthan 1000 MPa. In one or more embodiments, flexible housing tube 300 maybe manufactured from a material having a modulus of elasticity between30 and 80 GPa. Illustratively, flexible housing tube 300 may bemanufactured from a material having a modulus of elasticity less than 30GPa or greater than 80 GPa.

In one or more embodiments, flexible housing tube 300 may bemanufactured with dimensions suitable for performing microsurgicalprocedures, e.g., ophthalmic surgical procedures. Illustratively,flexible housing tube 300 may be manufactured at gauge sizes commonlyused in ophthalmic surgical procedures, e.g., 23 gauge, 25 gauge, etc.In one or more embodiments, flexible housing tube 300 may be configuredto be inserted in a cannula, e.g., a cannula used during an ophthalmicsurgical procedure. For example, one or more properties of flexiblehousing tube 300 may be optimized to reduce friction as flexible housingtube 300 is inserted into a cannula. In one or more embodiments, one ormore properties of flexible housing tube 300 may be optimized to reducefriction as flexible housing tube 300 is removed from a cannula.Illustratively, flexible housing tube 300 may have an ultimate tensilestrength between 1000 MPa and 1100 MPa. In one or more embodiments,flexible housing tube 300 may have an ultimate tensile strength lessthan 1000 MPa or greater than 1100 MPa.

In one or more embodiments, an optic fiber 310 may be disposed withinflexible housing tube 300. Illustratively, optic fiber 310 may comprisean optic fiber distal end 311 and an optic fiber proximal end 312. Inone or more embodiments, optic fiber 310 may be configured to transmitlight, e.g., laser light. Illustratively, optic fiber 310 may bedisposed within flexible housing tube 300 wherein optic fiber distal end311 may be adjacent to flexible housing tube distal end 301. In one ormore embodiments, a portion of optic fiber 310 may be fixed to a portionof flexible housing tube 300, e.g., by an adhesive or any suitablefixation means.

FIG. 4 is a schematic diagram illustrating an exploded view of asteerable laser probe assembly 400. Illustratively, a steerable laserprobe assembly 400 may comprise a handle 200, a flexible housing tube300 having a flexible housing tube distal end 301 and a flexible housingtube proximal end 302, an optic fiber 310 having an optic fiber distalend 311 and an optic fiber proximal end 312, and a light sourceinterface 410. Illustratively, light source interface 410 may beconfigured to interface with optic fiber 310, e.g., at optic fiberproximal end 312. In one or more embodiments, light source interface 410may comprise a standard light source connector, e.g., an SMA connector.

Illustratively, a portion of flexible housing tube 300 may be fixed tonosecone 105, e.g., flexible housing tube proximal end 302 may be fixedto nosecone distal end 106. In one or more embodiments, a portion offlexible housing tube 300 may be fixed to nosecone 105, e.g., by anadhesive or any suitable fixation means. Illustratively, a portion offlexible housing tube 300 may be disposed within nosecone 105, e.g.,flexible housing tube proximal end 302 may be disposed within nosecone105. In one or more embodiments, a portion of flexible housing tube 300may be fixed within nosecone 105, e.g., by an adhesive or any suitablefixation means. Illustratively, a portion of flexible housing tube 300may be disposed within flexible housing tube housing 240, e.g., flexiblehousing tube proximal end 302 may be disposed within flexible housingtube housing 240. In one or more embodiments, a portion of flexiblehousing tube 300 may be fixed within flexible housing tube housing 240,e.g., by an adhesive or any suitable fixation means. For example, aportion of flexible housing tube 300 may be fixed within flexiblehousing tube housing 240 by a press fit, a weld, etc.

Illustratively, optic fiber 310 may be disposed within inner bore 220,optic fiber guide 230, optic fiber housing 210, piston 150, innerhypodermic tube 140, nosecone 105, and flexible housing tube 300. In oneor more embodiments, optic fiber 310 may be disposed within flexiblehousing tube 300 wherein optic fiber distal end 311 is adjacent toflexible housing tube distal end 301. In one or more embodiments, aportion of optic fiber 310 may be fixed to a portion of flexible housingtube 300, e.g., by an adhesive or any suitable fixation means.Illustratively, a portion of optic fiber 310 may be fixed in a positionrelative to handle proximal end 202. In one or more embodiments, opticfiber 310 may be fixed within optic fiber housing 210, e.g., by anadhesive or any suitable fixation means. For example, optic fiber 310may be fixed within optic fiber housing 210 by a press fit, a setscrew,etc. Illustratively, a first portion of optic fiber 310 may be fixed inoptic fiber housing 210 and a second portion of optic fiber 310 may befixed to a portion of flexible housing tube 300.

In one or more embodiments, a compression of actuation structure 110 maybe configured to rotate one or more links 170 about one or more linkpins 180. Illustratively, a rotation of one or more links 170 about oneor more link pins 180 may be configured to extend nosecone 105 relativeto handle proximal end 202. In one or more embodiments, an extension ofnosecone 105 relative to handle proximal end 202 may be configured toextend flexible housing tube 300 relative to handle proximal end 202.Illustratively, an extension of flexible housing tube 300 relative tohandle proximal end 202 may be configured to extend flexible housingtube 300 relative to optic fiber 310. In one or more embodiments, aportion of optic fiber 310, e.g., a portion of optic fiber 310 fixed toflexible housing tube 300, may be configured to resist an extension offlexible housing tube 300 relative to optic fiber 310. Illustratively,optic fiber 310 may be fixed within optic fiber housing 210 and opticfiber 310 may be fixed to flexible housing tube 300. In one or moreembodiments, an extension of flexible housing tube 300 relative to opticfiber 310 may be configured to apply a force to a portion of flexiblehousing tube 300. Illustratively, an application of a force to a portionof flexible housing tube 300 may be configured to compress a portion offlexible housing tube 300, e.g., an application of a force to a portionof flexible housing tube 300 may be configured to compress a portion offlexible housing tube 300. In one or more embodiments, a compression ofa portion of flexible housing tube 300 may be configured to causeflexible housing tube 300 to gradually curve. Illustratively, a gradualcurving of flexible housing tube 300 may be configured to graduallycurve optic fiber 310. In one or more embodiments, a compression ofactuation structure 110 may be configured to gradually curve optic fiber310. Illustratively, a compression of actuation structure 110 may beconfigured to gradually curve flexible housing tube 300.

In one or more embodiments, a decompression of actuation structure 110may be configured to rotate one or more links 170 about one or more linkpins 180. Illustratively, a rotation of one or more links 170 about oneor more link pins 180 may be configured to retract nosecone 105 relativeto handle proximal end 202. In one or more embodiments, a refraction ofnosecone 105 relative to handle proximal end 202 may be configured toretract flexible housing tube 300 relative to handle proximal end 202.Illustratively, a retraction of flexible housing tube 300 relative tohandle proximal end 202 may be configured to retract flexible housingtube 300 relative to optic fiber 310. In one or more embodiments, aportion of optic fiber 310, e.g., a portion of optic fiber 310 fixed toflexible housing tube 300, may be configured to facilitate a retractionof flexible housing tube 300 relative to optic fiber 310.Illustratively, optic fiber 310 may be fixed within optic fiber housing210 and optic fiber 310 may be fixed to flexible housing tube 300. Inone or more embodiments, a retraction of flexible housing tube 300relative to optic fiber 310 may be configured to reduce a force appliedto a portion of flexible housing tube 300. Illustratively, a reductionof a force applied to a portion of flexible housing tube 300 may beconfigured to decompress a portion of flexible housing tube 300, e.g., areduction of a force applied to a portion of flexible housing tube 300may be configured to decompress a portion of flexible housing tube 300.In one or more embodiments, a decompression of a portion of flexiblehousing tube 300 may be configured to cause flexible housing tube 300 togradually straighten. Illustratively, a gradual straightening offlexible housing tube 300 may be configured to gradually straightenoptic fiber 310. In one or more embodiments, a decompression ofactuation structure 110 may be configured to gradually straighten opticfiber 310. Illustratively, a decompression of actuation structure 110may be configured to gradually straighten flexible housing tube 300.

FIGS. 5A, 5B, 5C, 5D, and 5E are schematic diagrams illustrating agradual curving of an optic fiber 310. FIG. 5A illustrates a straightoptic fiber 500. In one or more embodiments, optic fiber 310 maycomprise a straight optic fiber 500, e.g., when flexible housing tube300 is fully retracted relative to optic fiber 310. Illustratively,optic fiber 310 may comprise a straight optic fiber 500, e.g., whenactuation structure 110 is fully decompressed. In one or moreembodiments, optic fiber 310 may comprise a straight optic fiber 500,e.g., when nosecone 105 is fully retracted relative to handle proximalend 202. Illustratively, a line tangent to optic fiber distal end 311may be parallel to a line tangent to flexible housing tube proximal end302, e.g., when optic fiber 310 comprises a straight optic fiber 500.

FIG. 5B illustrates an optic fiber in a first curved position 510. Inone or more embodiments, a compression of actuation structure 110 may beconfigured to gradually curve optic fiber 310 from a straight opticfiber 500 to an optic fiber in a first curved position 510.Illustratively, a compression of actuation structure 110 may beconfigured to rotate one or more links 170 about one or more link pins180. In one or more embodiments, a rotation of one or more links 170about one or more link pins 180 may be configured to extend nosecone 105relative to handle proximal end 202. Illustratively, an extension ofnosecone 105 relative to handle proximal end 202 may be configured toextend flexible housing tube 300 relative to optic fiber 310. In one ormore embodiments, an extension of flexible housing tube 300 relative tooptic fiber 310 may be configured to apply a force to a portion offlexible housing tube 300, e.g., a portion of optic fiber 310 fixed toflexible housing tube 300 may be configured to apply a force to flexiblehousing tube 300. Illustratively, an application of a force to a portionof flexible housing tube 300 may be configured to compress a portion offlexible housing tube 300. In one or more embodiments, a compression ofa portion of flexible housing tube 300 may be configured to causeflexible housing tube 300 to gradually curve. Illustratively, a gradualcurving of flexible housing tube 300 may be configured to graduallycurve optic fiber 310, e.g., from a straight optic fiber 500 to an opticfiber in a first curved position 510. In one or more embodiments, a linetangent to optic fiber distal end 311 may intersect a line tangent toflexible housing tube proximal end 302 at a first angle, e.g., whenoptic fiber 310 comprises an optic fiber in a first curved position 510.In one or more embodiments, the first angle may comprise any anglegreater than zero degrees. For example, the first angle may comprise a45 degree angle.

FIG. 5C illustrates an optic fiber in a second curved position 520. Inone or more embodiments, a compression of actuation structure 110 may beconfigured to gradually curve optic fiber 310 from an optic fiber in afirst curved position 510 to an optic fiber in a second curved position520. Illustratively, a compression of actuation structure 110 may beconfigured to rotate one or more links 170 about one or more link pins180. In one or more embodiments, a rotation of one or more links 170about one or more link pins 180 may be configured to extend nosecone 105relative to handle proximal end 202. Illustratively, an extension ofnosecone 105 relative to handle proximal end 202 may be configured toextend flexible housing tube 300 relative to optic fiber 310. In one ormore embodiments, an extension of flexible housing tube 300 relative tooptic fiber 310 may be configured to apply a force to a portion offlexible housing tube 300, e.g., a portion of optic fiber 310 fixed toflexible housing tube 300 may be configured to apply a force to flexiblehousing tube 300. Illustratively, an application of a force to a portionof flexible housing tube 300 may be configured to compress a portion offlexible housing tube 300. In one or more embodiments, a compression ofa portion of flexible housing tube 300 may be configured to causeflexible housing tube 300 to gradually curve. Illustratively, a gradualcurving of flexible housing tube 300 may be configured to graduallycurve optic fiber 310, e.g., from an optic fiber in a first curvedposition 510 to an optic fiber in a second curved position 520. In oneor more embodiments, a line tangent to optic fiber distal end 311 mayintersect a line tangent to flexible housing tube proximal end 302 at asecond angle, e.g., when optic fiber 310 comprises an optic fiber in asecond curved position 520. In one or more embodiments, the second anglemay comprise any angle greater than the first angle. For example, thesecond angle may comprise a 90 degree angle.

FIG. 5D illustrates an optic fiber in a third curved position 530. Inone or more embodiments, a compression of actuation structure 110 may beconfigured to gradually curve optic fiber 310 from an optic fiber in asecond curved position 520 to an optic fiber in a third curved position530. Illustratively, a compression of actuation structure 110 may beconfigured to rotate one or more links 170 about one or more link pins180. In one or more embodiments, a rotation of one or more links 170about one or more link pins 180 may be configured to extend nosecone 105relative to handle proximal end 202. Illustratively, an extension ofnosecone 105 relative to handle proximal end 202 may be configured toextend flexible housing tube 300 relative to optic fiber 310. In one ormore embodiments, an extension of flexible housing tube 300 relative tooptic fiber 310 may be configured to apply a force to a portion offlexible housing tube 300, e.g., a portion of optic fiber 310 fixed toflexible housing tube 300 may be configured to apply a force to flexiblehousing tube 300. Illustratively, an application of a force to a portionof flexible housing tube 300 may be configured to compress a portion offlexible housing tube 300. In one or more embodiments, a compression ofa portion of flexible housing tube 300 may be configured to causeflexible housing tube 300 to gradually curve. Illustratively, a gradualcurving of flexible housing tube 300 may be configured to graduallycurve optic fiber 310, e.g., from an optic fiber in a second curvedposition 520 to an optic fiber in a third curved position 530. In one ormore embodiments, a line tangent to optic fiber distal end 311 mayintersect a line tangent to flexible housing tube proximal end 302 at athird angle, e.g., when optic fiber 310 comprises an optic fiber in athird curved position 530. In one or more embodiments, the third anglemay comprise any angle greater than the second angle. For example, thethird angle may comprise a 135 degree angle.

FIG. 5E illustrates an optic fiber in a fourth curved position 540. Inone or more embodiments, a compression of actuation structure 110 may beconfigured to gradually curve optic fiber 310 from an optic fiber in athird curved position 530 to an optic fiber in a fourth curved position540. Illustratively, a compression of actuation structure 110 may beconfigured to rotate one or more links 170 about one or more link pins180. In one or more embodiments, a rotation of one or more links 170about one or more link pins 180 may be configured to extend nosecone 105relative to handle proximal end 202. Illustratively, an extension ofnosecone 105 relative to handle proximal end 202 may be configured toextend flexible housing tube 300 relative to optic fiber 310. In one ormore embodiments, an extension of flexible housing tube 300 relative tooptic fiber 310 may be configured to apply a force to a portion offlexible housing tube 300, e.g., a portion of optic fiber 310 fixed toflexible housing tube 300 may be configured to apply a force to flexiblehousing tube 300. Illustratively, an application of a force to a portionof flexible housing tube 300 may be configured to compress a portion offlexible housing tube 300. In one or more embodiments, a compression ofa portion of flexible housing tube 300 may be configured to causeflexible housing tube 300 to gradually curve. Illustratively, a gradualcurving of flexible housing tube 300 may be configured to graduallycurve optic fiber 310, e.g., from an optic fiber in a third curvedposition 530 to an optic fiber in a fourth curved position 540. In oneor more embodiments, a line tangent to optic fiber distal end 311 may beparallel to a line tangent to flexible housing tube proximal end 302,e.g., when optic fiber 310 comprises an optic fiber in a fourth curvedposition 540.

In one or more embodiments, one or more properties of a steerable laserprobe may be adjusted to attain one or more desired steerable laserprobe features. Illustratively, a length that flexible housing tubedistal end 301 extends from nosecone distal end 106 may be adjusted tovary an amount of compression of actuation structure 110 configured tocurve flexible housing tube 300 to a particular curved position. In oneor more embodiments, a stiffness of flexible housing tube 300 may beadjusted to vary an amount of compression of actuation structure 110configured to curve flexible housing tube 300 to a particular curvedposition. Illustratively, flexible housing tube 300 may comprise a solidtube structure. In one or more embodiments, flexible housing tube 300may comprise one or more apertures, e.g., configured to vary a stiffnessof flexible housing tube 300. Illustratively, a material comprisingflexible housing tube 300 may be adjusted to vary an amount ofcompression of actuation structure 110 configured to curve flexiblehousing tube 300 to a particular curved position. In one or moreembodiments, a stiffness of flexible housing tube 300 may be adjusted tovary a bend radius of flexible housing tube 300. Illustratively, astiffness of flexible housing tube 300 may be adjusted to vary a radiusof curvature of flexible housing tube 300, e.g., when flexible housingtube 300 is in a particular curved position.

In one or more embodiments, at least a portion of optic fiber 310 may beenclosed in an optic fiber sleeve configured to, e.g., protect opticfiber 310, vary a stiffness of optic fiber 310, vary an optical propertyof optic fiber 310, etc. Illustratively, an optic fiber sleeve may beconfigured to compress a portion of flexible housing tube 300. Forexample, an optic fiber sleeve may be disposed over a portion of opticfiber 310 fixed within optic fiber housing 210 and the optic fibersleeve may be disposed over a portion of optic fiber 310 fixed to aportion of flexible housing tube 300. In one or more embodiments, acompression of actuation structure 110 may be configured to extendflexible housing tube 300 relative to the optic fiber sleeve.Illustratively, an extension of flexible housing tube 300 relative tothe optic fiber sleeve may cause the optic fiber sleeve to apply a forceto a portion of flexible housing tube 300. Illustratively, anapplication of a force to a portion of flexible housing tube 300 may beconfigured to compress a portion of flexible housing tube 300 causingflexible housing tube 300 to gradually curve.

Illustratively, optic fiber 310 may comprise a buffer, a claddingdisposed in the buffer, and a core disposed in the cladding. In one ormore embodiments, at least a portion of optic fiber 310 may comprise abuffer configured to protect an optical property of optic fiber 310.Illustratively, at least a portion of optic fiber 310 may comprise abuffer configured to protect an optical layer of optic fiber 310, e.g.,the buffer may protect an optical layer of a curved portion of opticfiber 310. In one or more embodiments, at least a portion of optic fiber310 may comprise a polyimide buffer configured to protect an opticalproperty of optic fiber 310. For example, at least a portion of opticfiber 310 may comprise a Kapton buffer configured to protect an opticalproperty of optic fiber 310.

Illustratively, a steerable laser probe may be configured to indicate,e.g., to a surgeon, a direction that optic fiber 310 may curve, e.g.,due to a compression of actuation structure 110. In one or moreembodiments, a portion of a steerable laser probe, e.g., handle 200, maybe marked in a manner configured to indicate a direction that opticfiber 310 may curve. For example, a portion of flexible housing tube 300may comprise a mark configured to indicate a direction that optic fiber310 may curve. Illustratively, flexible housing tube 300 may comprise aslight curve, e.g., a curve less than 7.5 degrees, when actuationstructure 110 is fully decompressed. In one or more embodiments,flexible housing tube 300 may comprise a slight curve configured toindicate a direction that optic fiber 310 may curve, e.g., due to acompression of actuation structure 110.

Illustratively, a steerable laser probe may comprise an actuationstructure 110, a nosecone 105 fixed to actuation structure 110 by one ormore links 170 and one or more link pins 180, a flexible housing tube300, and an optic fiber 310. In one or more embodiments, a compressionof actuation structure 110 may be configured to extend nosecone 105relative to actuation structure proximal end 112. Illustratively, anextension of nosecone 105 relative to actuation structure proximal end112 may be configured to extend flexible housing tube 300 relative tooptic fiber 310. In one or more embodiments, an extension of flexiblehousing tube 300 relative to optic fiber 310 may be configured to applya force to flexible housing tube 300. Illustratively an application of aforce to flexible housing tube 300 may be configured to compress aportion of flexible housing tube 300. In one or more embodiments, acompression of a portion of flexible housing tube 300 may cause flexiblehousing tube 300 to gradually curve. Illustratively, a gradual curvingof flexible housing tube 300 may be configured to gradually curve opticfiber 310.

FIGS. 6A, 6B, 6C, 6D, and 6E are schematic diagrams illustrating agradual straightening of an optic fiber 310. FIG. 6A illustrates a fullycurved optic fiber 600. In one or more embodiments, optic fiber 310 maycomprise a fully curved optic fiber 600, e.g., when flexible housingtube 300 is fully extended relative to optic fiber 310. Illustratively,optic fiber 310 may comprise a fully curved optic fiber 600, e.g., whenactuation structure 110 is fully compressed. In one or more embodiments,optic fiber 310 may comprise a fully curved optic fiber 600, e.g., whennosecone 105 is fully extended relative to handle proximal end 202.Illustratively, a line tangent to optic fiber distal end 311 may beparallel to a line tangent to flexible housing tube proximal end 302,e.g., when optic fiber 310 comprises a fully curved optic fiber 600.

FIG. 6B illustrates an optic fiber in a first partially straightenedposition 610. In one or more embodiments, a decompression of actuationstructure 110 may be configured to gradually straighten optic fiber 310from a fully curved optic fiber 600 to an optic fiber in a firstpartially straightened position 610. Illustratively, a decompression ofactuation structure 110 may be configured to rotate one or more links170 about one or more link pins 180. In one or more embodiments, arotation of one or more links 170 about one or more link pins 180 may beconfigured to retract nosecone 105 relative to handle proximal end 202.Illustratively, a retraction of nosecone 105 relative to handle proximalend 202 may be configured to retract flexible housing tube 300 relativeto optic fiber 310. In one or more embodiments, a retraction of flexiblehousing tube 300 relative to optic fiber 310 may be configured to reducea force applied to a portion of flexible housing tube 300, e.g., aportion of optic fiber 310 fixed to flexible housing tube 300 may beconfigured to reduce a force applied to flexible housing tube 300.Illustratively, a reduction of a force applied to a portion of flexiblehousing tube 300 may be configured to decompress a portion of flexiblehousing tube 300. In one or more embodiments, a decompression of aportion of flexible housing tube 300 may be configured to cause flexiblehousing tube 300 to gradually straighten. Illustratively, a gradualstraightening of flexible housing tube 300 may be configured togradually straighten optic fiber 310, e.g., from a fully curved opticfiber 600 to an optic fiber in a first partially straightened position610. In one or more embodiments, a line tangent to optic fiber distalend 311 may intersect a line tangent to flexible housing tube proximalend 302 at a first partially straightened angle, e.g., when optic fiber310 comprises an optic fiber in a first partially straightened position610. Illustratively, the first partially straightened angle may compriseany angle less than 180 degrees. For example, the first partiallystraightened angle may comprise a 135 degree angle.

FIG. 6C illustrates an optic fiber in a second partially straightenedposition 620. In one or more embodiments, a decompression of actuationstructure 110 may be configured to gradually straighten optic fiber 310from an optic fiber in a first partially straightened position 610 to anoptic fiber in a second partially straightened position 620.Illustratively, a decompression of actuation structure 110 may beconfigured to rotate one or more links 170 about one or more link pins180. In one or more embodiments, a rotation of one or more links 170about one or more link pins 180 may be configured to retract nosecone105 relative to handle proximal end 202. Illustratively, a retraction ofnosecone 105 relative to handle proximal end 202 may be configured toretract flexible housing tube 300 relative to optic fiber 310. In one ormore embodiments, a retraction of flexible housing tube 300 relative tooptic fiber 310 may be configured to reduce a force applied to a portionof flexible housing tube 300, e.g., a portion of optic fiber 310 fixedto flexible housing tube 300 may be configured to reduce a force appliedto flexible housing tube 300. Illustratively, a reduction of a forceapplied to a portion of flexible housing tube 300 may be configured todecompress a portion of flexible housing tube 300. In one or moreembodiments, a decompression of a portion of flexible housing tube 300may be configured to cause flexible housing tube 300 to graduallystraighten. Illustratively, a gradual straightening of flexible housingtube 300 may be configured to gradually straighten optic fiber 310,e.g., from an optic fiber in a first partially straightened position 610to an optic fiber in a second partially straightened position 620. Inone or more embodiments, a line tangent to optic fiber distal end 311may intersect a line tangent to flexible housing tube proximal end 302at a second partially straightened angle, e.g., when optic fiber 310comprises an optic fiber in a second partially straightened position620. Illustratively, the second partially straightened angle maycomprise any angle less than the first partially straightened angle. Forexample, the second partially straightened angle may comprise a 90degree angle.

FIG. 6D illustrates an optic fiber in a third partially straightenedposition 630. In one or more embodiments, a decompression of actuationstructure 110 may be configured to gradually straighten optic fiber 310from an optic fiber in a second partially straightened position 620 toan optic fiber in a third partially straightened position 630.Illustratively, a decompression of actuation structure 110 may beconfigured to rotate one or more links 170 about one or more link pins180. In one or more embodiments, a rotation of one or more links 170about one or more link pins 180 may be configured to retract nosecone105 relative to handle proximal end 202. Illustratively, a retraction ofnosecone 105 relative to handle proximal end 202 may be configured toretract flexible housing tube 300 relative to optic fiber 310. In one ormore embodiments, a retraction of flexible housing tube 300 relative tooptic fiber 310 may be configured to reduce a force applied to a portionof flexible housing tube 300, e.g., a portion of optic fiber 310 fixedto flexible housing tube 300 may be configured to reduce a force appliedto flexible housing tube 300. Illustratively, a reduction of a forceapplied to a portion of flexible housing tube 300 may be configured todecompress a portion of flexible housing tube 300. In one or moreembodiments, a decompression of a portion of flexible housing tube 300may be configured to cause flexible housing tube 300 to graduallystraighten. Illustratively, a gradual straightening of flexible housingtube 300 may be configured to gradually straighten optic fiber 310,e.g., from an optic fiber in a second partially straightened position620 to an optic fiber in a third partially straightened position 630. Inone or more embodiments, a line tangent to optic fiber distal end 311may intersect a line tangent to flexible housing tube proximal end 302at a third partially straightened angle, e.g., when optic fiber 310comprises an optic fiber in a third partially straightened position 630.Illustratively, the third partially straightened angle may comprise anyangle less than the second partially straightened angle. For example,the third partially straightened angle may comprise a 45 degree angle.

FIG. 6E illustrates an optic fiber in a fully straightened position 640.In one or more embodiments, a decompression of actuation structure 110may be configured to gradually straighten optic fiber 310 from an opticfiber in a third partially straightened position 630 to an optic fiberin a fully straightened position 640. Illustratively, a decompression ofactuation structure 110 may be configured to rotate one or more links170 about one or more link pins 180. In one or more embodiments, arotation of one or more links 170 about one or more link pins 180 may beconfigured to retract nosecone 105 relative to handle proximal end 202.Illustratively, a retraction of nosecone 105 relative to handle proximalend 202 may be configured to retract flexible housing tube 300 relativeto optic fiber 310. In one or more embodiments, a retraction of flexiblehousing tube 300 relative to optic fiber 310 may be configured to reducea force applied to a portion of flexible housing tube 300, e.g., aportion of optic fiber 310 fixed to flexible housing tube 300 may beconfigured to reduce a force applied to flexible housing tube 300.Illustratively, a reduction of a force applied to a portion of flexiblehousing tube 300 may be configured to decompress a portion of flexiblehousing tube 300. In one or more embodiments, a decompression of aportion of flexible housing tube 300 may be configured to cause flexiblehousing tube 300 to gradually straighten. Illustratively, a gradualstraightening of flexible housing tube 300 may be configured togradually straighten optic fiber 310, e.g., from an optic fiber in athird partially straightened position 630 to an optic fiber in a fullystraightened position 640. In one or more embodiments, a line tangent tooptic fiber distal end 311 may be parallel to a line tangent to flexiblehousing tube proximal end 302, e.g., when optic fiber 310 comprises anoptic fiber in a fully straightened position 640.

Illustratively, a surgeon may aim optic fiber distal end 311 at any of aplurality of targets within an eye, e.g., to perform a photocoagulationprocedure, to illuminate a surgical target site, etc. For example, asurgeon may aim optic fiber distal end 311 at any of a plurality oftargets within a human eye, e.g., to perform a photocoagulationprocedure, to illuminate a surgical target site, etc. In one or moreembodiments, a surgeon may aim optic fiber distal end 311 at any targetwithin a particular transverse plane of the inner eye by, e.g., rotatinghandle 200 to orient flexible housing tube 300 in an orientationconfigured to cause a curvature of flexible housing tube 300 within theparticular transverse plane of the inner eye and varying an amount ofcompression of actuation structure 110. Illustratively, a surgeon mayaim optic fiber distal end 311 at any target within a particularsagittal plane of the inner eye by, e.g., rotating handle 200 to orientflexible housing tube 300 in an orientation configured to cause acurvature of flexible housing tube 300 within the particular sagittalplane of the inner eye and varying an amount of compression of actuationstructure 110. In one or more embodiments, a surgeon may aim optic fiberdistal end 311 at any target within a particular frontal plane of theinner eye by, e.g., varying an amount of actuation of compression ofactuation structure 110 to orient a line tangent to optic fiber distalend 311 wherein the line tangent to optic fiber distal end 311 is withinthe particular frontal plane of the inner eye and rotating handle 200.Illustratively, a surgeon may aim optic fiber distal end 311 at anytarget located outside of the particular transverse plane, theparticular sagittal plane, and the particular frontal plane of the innereye, e.g., by varying a rotational orientation of handle 200 and varyingan amount of compression of actuation structure 110. In one or moreembodiments, a surgeon may aim optic fiber distal end 311 at any targetof a plurality of targets within an eye, e.g., without increasing alength of a portion of a steerable laser probe within the eye.Illustratively, a surgeon may aim optic fiber distal end 311 at anytarget of a plurality of targets within an eye, e.g., without decreasinga length of a portion of a steerable laser probe within the eye.

FIGS. 7A and 7B are schematic diagrams illustrating a handle 700. FIG.7A illustrates a side view of a handle 700. Illustratively, handle 700may comprise a handle distal end 701 and a handle proximal end 702. Inone or more embodiments, a portion of nosecone 105 may be fixed to aportion of actuation structure 110, e.g., nosecone proximal end 107 maybe fixed to actuation structure distal end 111. Illustratively, nosecone105 may be fixed to actuation structure 110, e.g., by one or more links170. In one or more embodiments, one or more link pins 180 may beconfigured to fix nosecone 105 to one or more links 170, e.g., aparticular link pin 180 may be disposed within nosecone 105 and aparticular link 170. Illustratively, one or more link pins 180 may beconfigured to fix actuation structure 110 to one or more links 170,e.g., a particular link pin 180 may be disposed within actuationstructure 110 and a particular link 170. In one or more embodiments, afirst link pin 180 may be configured to fix nosecone 105 to a particularlink 170 and a second link pin 180 may be configured to fix actuationstructure 110 to the particular link 175. Illustratively, one or morespacers 175 may be configured to prevent undesirable movement of one ormore links 170 relative to one or more link pins 180, e.g., a particularspacer 175 may be disposed over a portion of a particular link pin 180extending from a particular link 170.

In one or more embodiments, a portion of inner hypodermic tube 140 maybe disposed within piston 150, e.g., inner hypodermic tube proximal end142 may be disposed within piston 150. Illustratively, a portion ofinner hypodermic tube 140 may be fixed within piston 150, e.g., by anadhesive or any suitable fixation means. In one or more embodiments,inner hypodermic tube proximal end 142 may be fixed within piston 150,e.g., by an adhesive or any suitable fixation means. Illustratively,actuation guide 130 may be disposed within outer sleeve 120. In one ormore embodiments, actuation guide 130 may be fixed within outer sleeve120, e.g., by an adhesive or any suitable fixation means.Illustratively, piston 150 may be disposed within actuation guide 130.In one or more embodiments, piston 150 may be configured to actuatewithin actuation guide 130.

In one or more embodiments, distal ring 116 may be disposed over aportion of front plug 115. Illustratively, front plug 115 may beconfigured to interface with a portion of outer sleeve 120, e.g., frontplug 115 may be configured to interface with outer sleeve distal end121. In one or more embodiments, front plug 115 may be configured tointerface with a portion of actuation guide 130, e.g., front plug 115may be configured to interface with actuation guide distal end 131.Illustratively, front plug 115 may be disposed within outer sleeve 120.In one or more embodiments, a portion of front plug 115 may be disposedwithin actuation guide 130. Illustratively, distal ring 116 may bedisposed within actuation guide 130, e.g., distal ring 116 may beconfigured to form a hermetic seal within actuation guide 130.

In one or more embodiments, proximal ring 117 may be disposed over aportion of end plug 160. Illustratively, end plug 160 may be configuredto interface with a portion of outer sleeve 120, e.g., end plug 160 maybe configured to interface with outer sleeve proximal end 122. In one ormore embodiments, end plug 160 may be configured to interface with aportion of actuation guide 130, e.g., end plug 160 may be configured tointerface with actuation guide proximal end 132. For example, a portionof end plug 160 may be disposed within actuation guide 130.Illustratively, proximal ring 117 may be disposed within actuation guide130, e.g., proximal ring 117 may be configured to form a hermetic sealwithin actuation guide 130. In one or more embodiments, end plug 160 maybe disposed within outer sleeve 120. Illustratively, inner hypodermictube 140 may be disposed within piston 150, actuation guide 130, frontplug 115, distal ring 116, and nosecone 105. In one or more embodiments,a portion of inner hypodermic tube 140 may be fixed within nosecone 105,e.g., inner hypodermic tube distal end 141 may be fixed within nosecone105. Illustratively, a portion of inner hypodermic tube 140 may be fixedwithin nosecone 105, e.g., by an adhesive or any suitable fixationmeans.

In one or more embodiments, a compression of actuation structure 110 maybe configured to rotate one or more links 170 about one or more linkpins 180. Illustratively, a rotation of one or more links 170 about oneor more link pins 180 may be configured to extend a particular link pin180, e.g., a particular link pin 180 disposed in nosecone 105, relativeto handle proximal end 702. In one or more embodiments, an extension ofa particular link pin 180 disposed in nosecone 105 relative to handleproximal end 702 may be configured to extend nosecone 105 relative tohandle proximal end 702. Illustratively, a compression of actuationstructure 110 may be configured to extend nosecone 105 relative tohandle proximal end 702. In one or more embodiments, an extension ofnosecone 105 relative to handle proximal end 702 may be configured toextend inner hypodermic tube 140 relative to handle proximal end 702.Illustratively, an extension of inner hypodermic tube 140 relative tohandle proximal end 702 may be configured to actuate piston 150 withinactuation guide 130. In one or more embodiments, a compression ofactuation structure 110 may be configured to extend piston 150 relativeto handle proximal end 702.

In one or more embodiments, a decompression of action structure 110 maybe configured to rotate one or more links 170 about one or more linkpins 180. Illustratively, a rotation of one or more links 170 about oneor more link pins 180 may be configured to retract a particular link pin180, e.g., a particular link pin 180 disposed in nosecone 105, relativeto handle proximal end 702. In one or more embodiments, a retraction ofa particular link pin 180 disposed in nosecone 105 relative to handleproximal end 702 may be configured to retract nosecone 105 relative tohandle proximal end 702. Illustratively, a decompression of actuationstructure 110 may be configured to retract nosecone 105 relative tohandle proximal end 702. In one or more embodiments, a retraction ofnosecone 105 relative to handle proximal end 702 may be configured toretract inner hypodermic tube 140 relative to handle proximal end 702.Illustratively, a retraction of inner hypodermic tube 140 relative tohandle proximal end 702 may be configured to actuate piston 150 withinactuation guide 130. In one or more embodiments, a decompression ofactuation structure 110 may be configured to retract piston 150 relativeto handle proximal end 702.

FIG. 7B illustrates a cross-sectional view of a handle 700. In one ormore embodiments, handle 700 may comprise a cable housing 710, an innerbore 220, an optic fiber guide 230, and a flexible housing tube housing240. Illustratively, handle 700 may be manufactured from any suitablematerial, e.g., polymers, metals, metal alloys, etc., or from anycombination of suitable materials.

FIG. 8 is a schematic diagram illustrating a flexible housing tube 300.Illustratively, flexible housing tube 300 may comprise a flexiblehousing tube distal end 301 and a flexible housing tube proximal end302. Flexible housing tube 300 may be manufactured from any suitablematerial, e.g., polymers, metals, metal alloys, etc., or from anycombination of suitable materials. Illustratively, flexible housing tube300 may comprise a shape memory material, e.g., Nitinol. In one or moreembodiments, flexible housing tube 300 may be manufactured from amaterial having an ultimate tensile strength between 700 and 1000 MPa.Illustratively, flexible housing tube 300 may be manufactured from amaterial having ultimate tensile strength less than 700 MPa or greaterthan 1000 MPa. In one or more embodiments, flexible housing tube 300 maybe manufactured from a material having a modulus of elasticity between30 and 80 GPa. Illustratively, flexible housing tube 300 may bemanufactured from a material having a modulus of elasticity less than 30GPa or greater than 80 GPa.

In one or more embodiments, flexible housing tube 300 may bemanufactured with dimensions suitable for performing microsurgicalprocedures, e.g., ophthalmic surgical procedures. Illustratively,flexible housing tube 300 may be manufactured at gauge sizes commonlyused in ophthalmic surgical procedures, e.g., 23 gauge, 25 gauge, etc.In one or more embodiments, flexible housing tube 300 may be configuredto be inserted in a cannula, e.g., a cannula used during an ophthalmicsurgical procedure. For example, one or more properties of flexiblehousing tube 300 may be optimized to reduce friction as flexible housingtube 300 is inserted into a cannula. In one or more embodiments, one ormore properties of flexible housing tube 300 may be optimized to reducefriction as flexible housing tube 300 is removed from a cannula.Illustratively, flexible housing tube 300 may have an ultimate tensilestrength between 1000 MPa and 1100 MPa. In one or more embodiments,flexible housing tube 300 may have an ultimate tensile strength lessthan 1000 MPa or greater than 1100 MPa.

In one or more embodiments, an optic fiber 310 may be disposed withinflexible housing tube 300. Illustratively, optic fiber 310 may comprisean optic fiber distal end 311 and an optic fiber proximal end 312. Inone or more embodiments, optic fiber 310 may be configured to transmitlight, e.g., laser light. Illustratively, optic fiber 310 may bedisposed within flexible housing tube 300 wherein optic fiber distal end311 may be adjacent to flexible housing tube distal end 301. In one ormore embodiments, a portion of optic fiber 310 may be fixed to a portionof flexible housing tube 300, e.g., by an adhesive or any suitablefixation means.

Illustratively, a cable 810 may be disposed within flexible housing tube300. In one or more embodiments, cable 810 may comprise a cable distalend 811 and a cable proximal end 812. Illustratively, cable 810 may bedisposed within flexible housing tube 300 wherein cable distal end 811may be adjacent to flexible housing tube distal end 301. In one or moreembodiments, a portion of cable 810 may be fixed to a portion offlexible housing tube 300, e.g., by an adhesive or any suitable fixationmeans. For example, cable 810 may be fixed to a portion of flexiblehousing tube 300 by a weld, a mechanical means, a tie, etc.

FIG. 9 is a schematic diagram illustrating an exploded view of asteerable laser probe assembly 900. Illustratively, a steerable laserprobe assembly 900 may comprise a handle 700, a flexible housing tube300 having a flexible housing tube distal end 301 and a flexible housingtube proximal end 302, an optic fiber 310 having an optic fiber distalend 311 and an optic fiber proximal end 312, a cable 810 having a cabledistal end 811 and a cable proximal end 812, and a light sourceinterface 410. Illustratively, light source interface 410 may beconfigured to interface with optic fiber 310, e.g., at optic fiberproximal end 312. In one or more embodiments, light source interface 410may comprise a standard light source connector, e.g., an SMA connector.

Illustratively, a portion of flexible housing tube 300 may be fixed tonosecone 105, e.g., flexible housing tube proximal end 302 may be fixedto nosecone distal end 106. In one or more embodiments, a portion offlexible housing tube 300 may be fixed to nosecone 105, e.g., by anadhesive or any suitable fixation means. Illustratively, a portion offlexible housing tube 300 may be disposed within nosecone 105, e.g.,flexible housing tube proximal end 302 may be disposed within nosecone105. In one or more embodiments, a portion of flexible housing tube 300may be fixed within nosecone 105, e.g., by an adhesive or any suitablefixation means. Illustratively, a portion of flexible housing tube 300may be disposed within flexible housing tube housing 240, e.g., flexiblehousing tube proximal end 302 may be disposed within flexible housingtube housing 240. In one or more embodiments, a portion of flexiblehousing tube 300 may be fixed within flexible housing tube housing 240,e.g., by an adhesive or any suitable fixation means. For example, aportion of flexible housing tube 300 may be fixed within flexiblehousing tube housing 240 by a press fit, a weld, etc.

Illustratively, optic fiber 310 may be disposed within inner bore 220,optic fiber guide 230, piston 150, inner hypodermic tube 140, nosecone105, and flexible housing tube 300. In one or more embodiments, opticfiber 310 may be disposed within flexible housing tube 300 wherein opticfiber distal end 311 is adjacent to flexible housing tube distal end301. In one or more embodiments, a portion of optic fiber 310 may befixed to a portion of flexible housing tube 300, e.g., by an adhesive orany suitable fixation means.

Illustratively, cable 810 may be disposed within cable housing 710,optic fiber guide 230, piston 150, inner hypodermic tube 140, nosecone105, and flexible housing tube 300. In one or more embodiment, cable 810may be disposed within flexible housing tube 300 wherein cable distalend 811 may be adjacent to flexible housing tube distal end 301. In oneor more embodiments, a portion of cable 810 may be fixed to a portion offlexible housing tube 300, e.g., by an adhesive or any suitable fixationmeans. For example, cable 810 may be fixed to a portion of flexiblehousing tube 300 by a weld, a mechanical means, a tie, etc.Illustratively, a portion of cable 810 may be fixed in cable housing710, e.g., cable proximal end 812 may be fixed in cable housing 710. Inone or more embodiments, a portion of cable 810 may be fixed in cablehousing 710, e.g., by an adhesive or any suitable fixation means. Forexample, a portion of cable 810 may be fixed in cable housing 710 by apress fit, a weld, a tie, etc. Illustratively, cable 810 may be fixed incable housing 710 and cable 810 may be fixed to a portion of flexiblehousing tube 300. Cable 810 may be manufactured from any suitablematerial, e.g., polymers, metals, metal alloys, etc., or from anycombination of suitable materials.

In one or more embodiments, a compression of actuation structure 110 maybe configured to rotate one or more links 170 about one or more linkpins 180. Illustratively, a rotation of one or more links 170 about oneor more link pins 180 may be configured to extend nosecone 105 relativeto handle proximal end 702. In one or more embodiments, an extension ofnosecone 105 relative to handle proximal end 702 may be configured toextend flexible housing tube 300 relative to handle proximal end 702.Illustratively, an extension of flexible housing tube 300 relative tohandle proximal end 702 may be configured to extend flexible housingtube 300 relative to cable 810. In one or more embodiments, a portion ofcable 810, e.g., a portion of cable 810 fixed to flexible housing tube300, may be configured to resist an extension of flexible housing tube300 relative to cable 810. Illustratively, cable 810 may be fixed withincable housing 710 and cable 810 may be fixed to flexible housing tube300. In one or more embodiments, an extension of flexible housing tube300 relative to cable 810 may be configured to apply a force to aportion of flexible housing tube 300. Illustratively, an application ofa force to a portion of flexible housing tube 300 may be configured tocompress a portion of flexible housing tube 300. In one or moreembodiments, a compression of a portion of flexible housing tube 300 maybe configured to cause flexible housing tube 300 to gradually curve.Illustratively, a gradual curving of flexible housing tube 300 may beconfigured to gradually curve optic fiber 310. In one or moreembodiments, a compression of actuation structure 110 may be configuredto gradually curve optic fiber 310. Illustratively, a compression ofactuation structure 110 may be configured to gradually curve flexiblehousing tube 300.

In one or more embodiments, a decompression of actuation structure 110may be configured to rotate one or more links 170 about one or more linkpins 180. Illustratively, a rotation of one or more links 170 about oneor more link pins 180 may be configured to retract nosecone 105 relativeto handle proximal end 702. In one or more embodiments, a refraction ofnosecone 105 relative to handle proximal end 702 may be configured toretract flexible housing tube 300 relative to handle proximal end 702.Illustratively, a retraction of flexible housing tube 300 relative tohandle proximal end 702 may be configured to retract flexible housingtube 300 relative to cable 810. In one or more embodiments, a portion ofcable 810, e.g., a portion of cable 810 fixed to flexible housing tube300, may be configured to facilitate a retraction of flexible housingtube 300 relative to cable 810. Illustratively, cable 810 may be fixedwithin cable housing 710 and cable 810 may be fixed to flexible housingtube 300. In one or more embodiments, a retraction of flexible housingtube 300 relative to cable 810 may be configured to reduce a forceapplied to a portion of flexible housing tube 300. Illustratively, areduction of a force applied to a portion of flexible housing tube 300may be configured to decompress a portion of flexible housing tube 300.In one or more embodiments, a decompression of a portion of flexiblehousing tube 300 may be configured to cause flexible housing tube 300 togradually straighten. Illustratively, a gradual straightening offlexible housing tube 300 may be configured to gradually straightenoptic fiber 310. In one or more embodiments, a decompression ofactuation structure 110 may be configured to gradually straighten opticfiber 310. Illustratively, a decompression of actuation structure 110may be configured to gradually straighten flexible housing tube 300.

FIGS. 10A, 10B, 10C, 10D, and 10E are schematic diagrams illustrating agradual curving of an optic fiber 310. FIG. 10A illustrates a straightoptic fiber 1000. In one or more embodiments, optic fiber 310 maycomprise a straight optic fiber 1000, e.g., when flexible housing tube300 is fully retracted relative to cable 810. Illustratively, opticfiber 310 may comprise a straight optic fiber 1000, e.g., when actuationstructure 110 is fully decompressed. In one or more embodiments, opticfiber 310 may comprise a straight optic fiber 1000, e.g., when nosecone105 is fully retracted relative to handle proximal end 702.Illustratively, a line tangent to optic fiber distal end 311 may beparallel to a line tangent to flexible housing tube proximal end 302,e.g., when optic fiber 310 comprises a straight optic fiber 1000.

FIG. 10B illustrates an optic fiber in a first curved position 1010. Inone or more embodiments, a compression of actuation structure 110 may beconfigured to gradually curve optic fiber 310 from a straight opticfiber 1000 to an optic fiber in a first curved position 1010.Illustratively, a compression of actuation structure 110 may beconfigured to rotate one or more links 170 about one or more link pins180. In one or more embodiments, a rotation of one or more links 170about one or more link pins 180 may be configured to extend nosecone 105relative to handle proximal end 702. Illustratively, an extension ofnosecone 105 relative to handle proximal end 702 may be configured toextend flexible housing tube 300 relative to cable 810. In one or moreembodiments, an extension of flexible housing tube 300 relative to cable810 may be configured to apply a force to a portion of flexible housingtube 300, e.g., a portion of cable 810 fixed to flexible housing tube300 may be configured to apply a force to flexible housing tube 300.Illustratively, an application of a force to a portion of flexiblehousing tube 300 may be configured to compress a portion of flexiblehousing tube 300. In one or more embodiments, a compression of a portionof flexible housing tube 300 may be configured to cause flexible housingtube 300 to gradually curve. Illustratively, a gradual curving offlexible housing tube 300 may be configured to gradually curve opticfiber 310, e.g., from a straight optic fiber 1000 to an optic fiber in afirst curved position 1010. In one or more embodiments, a line tangentto optic fiber distal end 311 may intersect a line tangent to flexiblehousing tube proximal end 302 at a first angle, e.g., when optic fiber310 comprises an optic fiber in a first curved position 1010. In one ormore embodiments, the first angle may comprise any angle greater thanzero degrees. For example, the first angle may comprise a 45 degreeangle.

FIG. 10C illustrates an optic fiber in a second curved position 1020. Inone or more embodiments, a compression of actuation structure 110 may beconfigured to gradually curve optic fiber 310 from an optic fiber in afirst curved position 1010 to an optic fiber in a second curved position1020. Illustratively, a compression of actuation structure 110 may beconfigured to rotate one or more links 170 about one or more link pins180. In one or more embodiments, a rotation of one or more links 170about one or more link pins 180 may be configured to extend nosecone 105relative to handle proximal end 702. Illustratively, an extension ofnosecone 105 relative to handle proximal end 702 may be configured toextend flexible housing tube 300 relative to cable 810. In one or moreembodiments, an extension of flexible housing tube 300 relative to cable810 may be configured to apply a force to a portion of flexible housingtube 300, e.g., a portion of cable 810 fixed to flexible housing tube300 may be configured to apply a force to flexible housing tube 300.Illustratively, an application of a force to a portion of flexiblehousing tube 300 may be configured to compress a portion of flexiblehousing tube 300. In one or more embodiments, a compression of a portionof flexible housing tube 300 may be configured to cause flexible housingtube 300 to gradually curve. Illustratively, a gradual curving offlexible housing tube 300 may be configured to gradually curve opticfiber 310, e.g., from an optic fiber in a first curved position 1010 toan optic fiber in a second curved position 1020. In one or moreembodiments, a line tangent to optic fiber distal end 311 may intersecta line tangent to flexible housing tube proximal end 302 at a secondangle, e.g., when optic fiber 310 comprises an optic fiber in a secondcurved position 1020. In one or more embodiments, the second angle maycomprise any angle greater than the first angle. For example, the secondangle may comprise a 90 degree angle.

FIG. 10D illustrates an optic fiber in a third curved position 1030. Inone or more embodiments, a compression of actuation structure 110 may beconfigured to gradually curve optic fiber 310 from an optic fiber in asecond curved position 1020 to an optic fiber in a third curved position1030. Illustratively, a compression of actuation structure 110 may beconfigured to rotate one or more links 170 about one or more link pins180. In one or more embodiments, a rotation of one or more links 170about one or more link pins 180 may be configured to extend nosecone 105relative to handle proximal end 702. Illustratively, an extension ofnosecone 105 relative to handle proximal end 702 may be configured toextend flexible housing tube 300 relative to cable 810. In one or moreembodiments, an extension of flexible housing tube 300 relative to cable810 may be configured to apply a force to a portion of flexible housingtube 300, e.g., a portion of cable 810 fixed to flexible housing tube300 may be configured to apply a force to flexible housing tube 300.Illustratively, an application of a force to a portion of flexiblehousing tube 300 may be configured to compress a portion of flexiblehousing tube 300. In one or more embodiments, a compression of a portionof flexible housing tube 300 may be configured to cause flexible housingtube 300 to gradually curve. Illustratively, a gradual curving offlexible housing tube 300 may be configured to gradually curve opticfiber 310, e.g., from an optic fiber in a second curved position 1020 toan optic fiber in a third curved position 1030. In one or moreembodiments, a line tangent to optic fiber distal end 311 may intersecta line tangent to flexible housing tube proximal end 302 at a thirdangle, e.g., when optic fiber 310 comprises an optic fiber in a thirdcurved position 1030. In one or more embodiments, the third angle maycomprise any angle greater than the second angle. For example, the thirdangle may comprise a 135 degree angle.

FIG. 10E illustrates an optic fiber in a fourth curved position 1040. Inone or more embodiments, a compression of actuation structure 110 may beconfigured to gradually curve optic fiber 310 from an optic fiber in athird curved position 1030 to an optic fiber in a fourth curved position1040. Illustratively, a compression of actuation structure 110 may beconfigured to rotate one or more links 170 about one or more link pins180. In one or more embodiments, a rotation of one or more links 170about one or more link pins 180 may be configured to extend nosecone 105relative to handle proximal end 702. Illustratively, an extension ofnosecone 105 relative to handle proximal end 702 may be configured toextend flexible housing tube 300 relative to cable 810. In one or moreembodiments, an extension of flexible housing tube 300 relative to cable810 may be configured to apply a force to a portion of flexible housingtube 300, e.g., a portion of cable 810 fixed to flexible housing tube300 may be configured to apply a force to flexible housing tube 300.Illustratively, an application of a force to a portion of flexiblehousing tube 300 may be configured to compress a portion of flexiblehousing tube 300. In one or more embodiments, a compression of a portionof flexible housing tube 300 may be configured to cause flexible housingtube 300 to gradually curve. Illustratively, a gradual curving offlexible housing tube 300 may be configured to gradually curve opticfiber 310, e.g., from an optic fiber in a third curved position 1030 toan optic fiber in a fourth curved position 1040. In one or moreembodiments, a line tangent to optic fiber distal end 311 may beparallel to a line tangent to flexible housing tube proximal end 302,e.g., when optic fiber 310 comprises an optic fiber in a fourth curvedposition 1040.

In one or more embodiments, one or more properties of a steerable laserprobe may be adjusted to attain one or more desired steerable laserprobe features. Illustratively, a length that flexible housing tubedistal end 301 extends from nosecone distal end 106 may be adjusted tovary an amount of compression of actuation structure 110 configured tocurve flexible housing tube 300 to a particular curved position. In oneor more embodiments, a stiffness of flexible housing tube 300 may beadjusted to vary an amount of compression of actuation structure 110configured to curve flexible housing tube 300 to a particular curvedposition. Illustratively, flexible housing tube 300 may comprise a solidtube structure. In one or more embodiments, flexible housing tube 300may comprise one or more apertures, e.g., configured to vary a stiffnessof flexible housing tube 300. Illustratively, a material comprisingflexible housing tube 300 may be adjusted to vary an amount ofcompression of actuation structure 110 configured to curve flexiblehousing tube 300 to a particular curved position. In one or moreembodiments, a stiffness of flexible housing tube 300 may be adjusted tovary a bend radius of flexible housing tube 300. Illustratively, astiffness of flexible housing tube 300 may be adjusted to vary a radiusof curvature of flexible housing tube 300, e.g., when flexible housingtube 300 is in a particular curved position.

In one or more embodiments, at least a portion of optic fiber 310 may beenclosed in an optic fiber sleeve configured to, e.g., protect opticfiber 310, vary a stiffness of optic fiber 310, vary an optical propertyof optic fiber 310, etc. Illustratively, optic fiber 310 may comprise abuffer, a cladding disposed in the buffer, and a core disposed in thecladding. In one or more embodiments, at least a portion of optic fiber310 may comprise a buffer configured to protect an optical property ofoptic fiber 310. Illustratively, at least a portion of optic fiber 310may comprise a buffer configured to protect an optical layer of opticfiber 310, e.g., the buffer may protect an optical layer of a curvedportion of optic fiber 310. In one or more embodiments, at least aportion of optic fiber 310 may comprise a polyimide buffer configured toprotect an optical property of optic fiber 310. For example, at least aportion of optic fiber 310 may comprise a Kapton buffer configured toprotect an optical property of optic fiber 310.

In one or more embodiments, a location wherein cable 810 may be fixed toflexible housing tube 300 may be adjusted to vary an amount ofcompression of actuation structure 110 configured to curve flexiblehousing tube 300 to a particular curved position. For example, a portionof cable 810 may be fixed to an outer portion of flexible housing tube300. Illustratively, cable 810 may be fixed to flexible housing tube 300at a plurality of fixation points, e.g., to vary one or more propertiesof a steerable laser probe. In one or more embodiments, a length ofcable 810 may be adjusted to vary an amount of compression of actuationstructure 110 configured to curve flexible housing tube 300 to aparticular curved position. Illustratively, a steerable laser probe maycomprise one or more redundant cables 810. In one or more embodiments,one or more redundant cables 810 may be configured to maintain aparticular curved position of flexible housing tube 300, e.g., in theevent that cable 810 breaks or fails. Illustratively, one or moreredundant cables 810 may be configured to maintain a particular curvedposition of flexible housing tube 300, e.g., in the event that a cable810 fixation means fails. In one or more embodiments, one or moreredundant cables 810 may be configured to maintain a particular curvedposition of flexible housing tube 300, e.g., in the event that cable 810is no longer configured to maintain the particular curved position offlexible housing tube 300. Illustratively, one or more redundant cables810 may be configured to maintain a particular curved position offlexible housing tube 300 wherein cable 810 is also configured tomaintain the particular curved position of flexible housing tube 300.

In one or more embodiments, flexible housing tube 300 may comprise anaccess window configured to allow access to a portion cable 810.Illustratively, cable 810 may be fixed to a portion of flexible housingtube 300, e.g., by looping a portion of cable 810 through an aperture inflexible housing tube 300. In one or more embodiments, cable 810 may befixed to a portion of flexible housing tube 300, e.g., by a purelymechanical means. For example, cable 810 may be fixed to a portion offlexible housing tube 300 in a manner other than by an adhesive, a weld,etc. Illustratively, cable 810 may be fixed to a portion of flexiblehousing tube 300 wherein a portion of cable 810 is configured to fail ata first applied failure force and a fixation means that fixes a portionof cable 810 to a portion of flexible housing tube 300 is configured tofail at a second applied failure force. In one or more embodiments, thesecond applied failure force may be greater than the first appliedfailure force.

Illustratively, a steerable laser probe may be configured to indicate,e.g., to a surgeon, a direction that optic fiber 310 may curve, e.g.,due to a compression of actuation structure 110. In one or moreembodiments, a portion of a steerable laser probe, e.g., handle 700, maybe marked in a manner configured to indicate a direction that opticfiber 310 may curve. For example, a portion of flexible housing tube 300may comprise a mark configured to indicate a direction that optic fiber310 may curve. Illustratively, flexible housing tube 300 may comprise aslight curve, e.g., a curve less than 7.5 degrees, when actuationstructure 110 is fully decompressed. In one or more embodiments,flexible housing tube 300 may comprise a slight curve configured toindicate a direction that optic fiber 310 may curve, e.g., due to acompression of actuation structure 110.

Illustratively, a steerable laser probe may comprise an actuationstructure 110, a nosecone 105 fixed to actuation structure 110 by one ormore links 170 and one or more link pins 180, a flexible housing tube300, an optic fiber 310, and a cable 810. In one or more embodiments, acompression of actuation structure 110 may be configured to extendnosecone 105 relative to actuation structure proximal end 112.Illustratively, an extension of nosecone 105 relative to actuationstructure proximal end 112 may be configured to extend flexible housingtube 300 relative to cable 810. In one or more embodiments, an extensionof flexible housing tube 300 relative to cable 810 may be configured toapply a force to flexible housing tube 300. Illustratively anapplication of a force to flexible housing tube 300 may be configured tocompress a portion of flexible housing tube 300. In one or moreembodiments, a compression of a portion of flexible housing tube 300 maycause flexible housing tube 300 to gradually curve. Illustratively, agradual curving of flexible housing tube 300 may be configured togradually curve optic fiber 310.

FIGS. 11A, 11B, 11C, 11D, and 11E are schematic diagrams illustrating agradual straightening of an optic fiber 310. FIG. 11A illustrates afully curved optic fiber 1100. In one or more embodiments, optic fiber310 may comprise a fully curved optic fiber 1100, e.g., when flexiblehousing tube 300 is fully extended relative to cable 810.Illustratively, optic fiber 310 may comprise a fully curved optic fiber1100, e.g., when actuation structure 110 is fully compressed. In one ormore embodiments, optic fiber 310 may comprise a fully curved opticfiber 1100, e.g., when nosecone 105 is fully extended relative to handleproximal end 702. Illustratively, a line tangent to optic fiber distalend 311 may be parallel to a line tangent to flexible housing tubeproximal end 302, e.g., when optic fiber 310 comprises a fully curvedoptic fiber 1100.

FIG. 11B illustrates an optic fiber in a first partially straightenedposition 1110. In one or more embodiments, a decompression of actuationstructure 110 may be configured to gradually straighten optic fiber 310from a fully curved optic fiber 1100 to an optic fiber in a firstpartially straightened position 1110. Illustratively, a decompression ofactuation structure 110 may be configured to rotate one or more links170 about one or more link pins 180. In one or more embodiments, arotation of one or more links 170 about one or more link pins 180 may beconfigured to retract nosecone 105 relative to handle proximal end 702.Illustratively, a retraction of nosecone 105 relative to handle proximalend 702 may be configured to retract flexible housing tube 300 relativeto cable 810. In one or more embodiments, a retraction of flexiblehousing tube 300 relative to cable 810 may be configured to reduce aforce applied to a portion of flexible housing tube 300, e.g., a portionof cable 810 fixed to flexible housing tube 300 may be configured toreduce a force applied to flexible housing tube 300. Illustratively, areduction of a force applied to a portion of flexible housing tube 300may be configured to decompress a portion of flexible housing tube 300.In one or more embodiments, a decompression of a portion of flexiblehousing tube 300 may be configured to cause flexible housing tube 300 togradually straighten. Illustratively, a gradual straightening offlexible housing tube 300 may be configured to gradually straightenoptic fiber 310, e.g., from a fully curved optic fiber 1100 to an opticfiber in a first partially straightened position 1110. In one or moreembodiments, a line tangent to optic fiber distal end 311 may intersecta line tangent to flexible housing tube proximal end 302 at a firstpartially straightened angle, e.g., when optic fiber 310 comprises anoptic fiber in a first partially straightened position 1110.Illustratively, the first partially straightened angle may comprise anyangle less than 180 degrees. For example, the first partiallystraightened angle may comprise a 135 degree angle.

FIG. 11C illustrates an optic fiber in a second partially straightenedposition 1120. In one or more embodiments, a decompression of actuationstructure 110 may be configured to gradually straighten optic fiber 310from an optic fiber in a first partially straightened position 1110 toan optic fiber in a second partially straightened position 1120.Illustratively, a decompression of actuation structure 110 may beconfigured to rotate one or more links 170 about one or more link pins180. In one or more embodiments, a rotation of one or more links 170about one or more link pins 180 may be configured to retract nosecone105 relative to handle proximal end 702. Illustratively, a retraction ofnosecone 105 relative to handle proximal end 702 may be configured toretract flexible housing tube 300 relative to cable 810. In one or moreembodiments, a retraction of flexible housing tube 300 relative to cable810 may be configured to reduce a force applied to a portion of flexiblehousing tube 300, e.g., a portion of cable 810 fixed to flexible housingtube 300 may be configured to reduce a force applied to flexible housingtube 300. Illustratively, a reduction of a force applied to a portion offlexible housing tube 300 may be configured to decompress a portion offlexible housing tube 300. In one or more embodiments, a decompressionof a portion of flexible housing tube 300 may be configured to causeflexible housing tube 300 to gradually straighten. Illustratively, agradual straightening of flexible housing tube 300 may be configured togradually straighten optic fiber 310, e.g., from an optic fiber in afirst partially straightened position 1110 to an optic fiber in a secondpartially straightened position 1120. In one or more embodiments, a linetangent to optic fiber distal end 311 may intersect a line tangent toflexible housing tube proximal end 302 at a second partiallystraightened angle, e.g., when optic fiber 310 comprises an optic fiberin a second partially straightened position 1120. Illustratively, thesecond partially straightened angle may comprise any angle less than thefirst partially straightened angle. For example, the second partiallystraightened angle may comprise a 90 degree angle.

FIG. 11D illustrates an optic fiber in a third partially straightenedposition 1130. In one or more embodiments, a decompression of actuationstructure 110 may be configured to gradually straighten optic fiber 310from an optic fiber in a second partially straightened position 1120 toan optic fiber in a third partially straightened position 1130.Illustratively, a decompression of actuation structure 110 may beconfigured to rotate one or more links 170 about one or more link pins180. In one or more embodiments, a rotation of one or more links 170about one or more link pins 180 may be configured to retract nosecone105 relative to handle proximal end 702. Illustratively, a retraction ofnosecone 105 relative to handle proximal end 702 may be configured toretract flexible housing tube 300 relative to cable 810. In one or moreembodiments, a retraction of flexible housing tube 300 relative to cable810 may be configured to reduce a force applied to a portion of flexiblehousing tube 300, e.g., a portion of cable 810 fixed to flexible housingtube 300 may be configured to reduce a force applied to flexible housingtube 300. Illustratively, a reduction of a force applied to a portion offlexible housing tube 300 may be configured to decompress a portion offlexible housing tube 300. In one or more embodiments, a decompressionof a portion of flexible housing tube 300 may be configured to causeflexible housing tube 300 to gradually straighten. Illustratively, agradual straightening of flexible housing tube 300 may be configured togradually straighten optic fiber 310, e.g., from an optic fiber in asecond partially straightened position 1120 to an optic fiber in a thirdpartially straightened position 1130. In one or more embodiments, a linetangent to optic fiber distal end 311 may intersect a line tangent toflexible housing tube proximal end 302 at a third partially straightenedangle, e.g., when optic fiber 310 comprises an optic fiber in a thirdpartially straightened position 1130. Illustratively, the thirdpartially straightened angle may comprise any angle less than the secondpartially straightened angle. For example, the third partiallystraightened angle may comprise a 45 degree angle.

FIG. 11E illustrates an optic fiber in a fully straightened position1140. In one or more embodiments, a decompression of actuation structure110 may be configured to gradually straighten optic fiber 310 from anoptic fiber in a third partially straightened position 1130 to an opticfiber in a fully straightened position 1140. Illustratively, adecompression of actuation structure 110 may be configured to rotate oneor more links 170 about one or more link pins 180. In one or moreembodiments, a rotation of one or more links 170 about one or more linkpins 180 may be configured to retract nosecone 105 relative to handleproximal end 702. Illustratively, a retraction of nosecone 105 relativeto handle proximal end 702 may be configured to retract flexible housingtube 300 relative to cable 810. In one or more embodiments, a retractionof flexible housing tube 300 relative to cable 810 may be configured toreduce a force applied to a portion of flexible housing tube 300, e.g.,a portion of cable 810 fixed to flexible housing tube 300 may beconfigured to reduce a force applied to flexible housing tube 300.Illustratively, a reduction of a force applied to a portion of flexiblehousing tube 300 may be configured to decompress a portion of flexiblehousing tube 300. In one or more embodiments, a decompression of aportion of flexible housing tube 300 may be configured to cause flexiblehousing tube 300 to gradually straighten. Illustratively, a gradualstraightening of flexible housing tube 300 may be configured togradually straighten optic fiber 310, e.g., from an optic fiber in athird partially straightened position 1130 to an optic fiber in a fullystraightened position 1140. In one or more embodiments, a line tangentto optic fiber distal end 311 may be parallel to a line tangent toflexible housing tube proximal end 302, e.g., when optic fiber 310comprises an optic fiber in a fully straightened position 1140.

Illustratively, a surgeon may aim optic fiber distal end 311 at any of aplurality of targets within an eye, e.g., to perform a photocoagulationprocedure, to illuminate a surgical target site, etc. For example, asurgeon may aim optic fiber distal end 311 at any of a plurality oftargets within a human eye, e.g., to perform a photocoagulationprocedure, to illuminate a surgical target site, etc. In one or moreembodiments, a surgeon may aim optic fiber distal end 311 at any targetwithin a particular transverse plane of the inner eye by, e.g., rotatinghandle 700 to orient flexible housing tube 300 in an orientationconfigured to cause a curvature of flexible housing tube 300 within theparticular transverse plane of the inner eye and varying an amount ofcompression of actuation structure 110. Illustratively, a surgeon mayaim optic fiber distal end 311 at any target within a particularsagittal plane of the inner eye by, e.g., rotating handle 700 to orientflexible housing tube 300 in an orientation configured to cause acurvature of flexible housing tube 300 within the particular sagittalplane of the inner eye and varying an amount of compression of actuationstructure 110. In one or more embodiments, a surgeon may aim optic fiberdistal end 311 at any target within a particular frontal plane of theinner eye by, e.g., varying an amount of actuation of compression ofactuation structure 110 to orient a line tangent to optic fiber distalend 311 wherein the line tangent to optic fiber distal end 311 is withinthe particular frontal plane of the inner eye and rotating handle 700.Illustratively, a surgeon may aim optic fiber distal end 311 at anytarget located outside of the particular transverse plane, theparticular sagittal plane, and the particular frontal plane of the innereye, e.g., by varying a rotational orientation of handle 700 and varyingan amount of compression of actuation structure 110. In one or moreembodiments, a surgeon may aim optic fiber distal end 311 at any targetof a plurality of targets within an eye, e.g., without increasing alength of a portion of a steerable laser probe within the eye.Illustratively, a surgeon may aim optic fiber distal end 311 at anytarget of a plurality of targets within an eye, e.g., without decreasinga length of a portion of a steerable laser probe within the eye.

The foregoing description has been directed to particular embodiments ofthis invention. It will be apparent; however, that other variations andmodifications may be made to the described embodiments, with theattainment of some or all of their advantages. Specifically, it shouldbe noted that the principles of the present invention may be implementedin any system. Furthermore, while this description has been written interms of a surgical instrument, the teachings of the present inventionare equally suitable to systems where the functionality may be employed.Therefore, it is the object of the appended claims to cover all suchvariations and modifications as come within the true spirit and scope ofthe invention.

What is claimed is:
 1. A method for performing an ophthalmic procedurecomprising: compressing an actuation structure of a handle wherein theactuation structure has an actuation structure distal end and anactuation structure proximal end and wherein the handle has a handledistal end and a handle proximal end; rotating a first link about afirst link pin; preventing movement of the first link relative to thefirst link pin; rotating the first link about a second link pin;preventing movement of the first link relative to the second link pin;extending the second link pin relative to the handle proximal end;rotating a second link about a third link pin; preventing movement ofthe second link relative to the third link pin; rotating the second linkabout a fourth link pin; preventing movement of the second link relativeto the fourth link pin; extending the fourth link pin relative to thehandle proximal end; extending a nosecone relative to the handleproximal end by a rotation of the first link about the first link pinand the second link pin and by a rotation of the second link about thethird link pin and the fourth link pin; extending an inner hypodermictube relative to the handle proximal end wherein the inner hypodermictube has an inner hypodermic tube distal end and an inner hypodermictube proximal end and wherein the inner hypodermic tube proximal end isfixed within a piston and the inner hypodermic tube distal end is fixedwithin the nosecone; actuating the piston within an actuation guide;extending the piston relative to the handle proximal end wherein thepiston has a piston distal end and a piston proximal end; extending aflexible housing tube relative to the handle proximal end wherein theflexible housing tube has a flexible housing tube distal end and aflexible housing tube proximal end; applying a force to a portion of theflexible housing tube; curving the flexible housing tube; curving anoptic fiber relative to the flexible housing tube proximal end whereinthe optic fiber has an optic fiber distal end and an optic fiberproximal end and wherein the optic fiber is disposed in the flexiblehousing tube, an optic fiber guide, the piston, the inner hypodermictube, and the nosecone; aiming the optic fiber distal end at aphotocoagulation target; and performing a photocoagulation procedure. 2.The method of claim 1 further comprising: curving the optic fiber atleast 45 degrees relative to the flexible housing tube proximal end. 3.The method of claim 1 further comprising: extending the flexible housingtube relative to the optic fiber.
 4. The method of claim 1 furthercomprising: extending the flexible housing tube relative to a cablewherein the cable has a cable distal end and a cable proximal end. 5.The method of claim 4 further comprising: extending the flexible housingtube relative to a redundant cable wherein the redundant cable has aredundant cable distal end and a redundant cable proximal end.
 6. Themethod of claim 1 further comprising: compressing the portion of theflexible housing tube.
 7. The method of claim 1 further comprising:indicating a direction that the optic fiber curves.
 8. The method ofclaim 1 further comprising: curving the optic fiber within an eyewithout increasing a length of the optic fiber within the eye.
 9. Themethod of claim 1 further comprising: curving the optic fiber within aneye without decreasing a length of the optic fiber within the eye. 10.The method of claim 1 further comprising: decompressing the actuationstructure of the handle.
 11. The method of claim 10 further comprising:straightening the optic fiber relative to the flexible housing tubeproximal end.
 12. The method of claim 10 further comprising:straightening the flexible housing tube.
 13. The method of claim 10further comprising: retracting the inner hypodermic tube relative to thehandle proximal end.
 14. The method of claim 10 further comprising:retracting the piston relative to the handle proximal end.
 15. Themethod of claim 10 further comprising: retracting the flexible housingtube relative to the handle proximal end.
 16. The method of claim 10further comprising: straightening the optic fiber within an eye withoutincreasing a length of the optic fiber within the eye.
 17. The method ofclaim 10 further comprising: straightening the optic fiber within an eyewithout decreasing a length of the optic fiber within the eye.
 18. Themethod of claim 10 further comprising: straightening the optic fiber atleast 45 degrees relative to the flexible housing tube proximal end. 19.The method of claim 1 further comprising: cauterizing a portion of aretina.
 20. The method of claim 1 wherein the flexible housing tube ismanufactured from nitinol.